# 多行注释：选中所要注释的代码，同时按下ctrl+/
# arr = [1,2,3,4]
# total = 0
# time = 0
# for i in range(len(arr)):
#     for j in range(len(arr)):
#         if (j!= i):
#             for k in range(len(arr)):
#                 if(k != i and k != j):
#                     num = arr[i]*100+arr[j]*10+arr[k]
#                     total += num
#                     time += 1
# print("总共可以组合成：",time,"个数字")
# print("平均值为:",total/time)

name = input('请输入名字：')
print('你好,', name, '!')